Convertible hair-clipper



J. N. JOHNSONn CONVERTIBLE HAIR CLIPPER.

APPLICATION FILED DEC. le, 1919.

mmm

Natented Aug.. 3L M2M WITNESS:

JOHN N. I'L'lI-INSON,l 0F ALBUQUERQUE, NEWIVIEXICO.

CNVlEB/TIBLE HAIR-CLIPPER. l

Specification of Letters Patent. Patntedl filming. gli, 1192119..

Application med December 16, 4191e. serial No. 345,199.'

To all whom t may concern.'

Be it known that I, JOHN N. JOHNSON, -a

citizen ofthe United States, residing atfrom one form of operation tothe other can "be'iquickly and easily accomplished and which are simpleyin construction, reliable and eliici'ent in operation and inexpensive tomanufacture A further object is to providey power operating clippers inwhich the rate of operation can be mechanically varied within certainlimits, and to provide improved power operating I neans.

lncarrying out my lnvention l provlde a reciprocating cutter operated anoscillating armature which has a string arm exy tension and anadjustable ball or weight on the free-end of the extension. Magnets aredisposed on opposite sides of thel armature and their activity iscontrolled by a forked contact arm which is oscillated by the armatureor its extension. The forked arm carries adjustable contacts leading tothe op'- posed magnets. The main circuit is controlled by a switch, onepart of which is operated by the pivoted handle of the clipper. Toenableconversion of the clippers from power to manual operation, amanuallyoperated member is provided which, when shifted, forces thespring extension to one extreme position and yieldingly holds Ythearmature in a corresponding position, while intermediate linkageoperated by the manually operatedLmember interposes a slidable memberbetween the pivoted clipper handleand the flat s ring at a pointadjacent the armature. ith this setting of the various parts, anoperation of the pivoted clipperl handle will, through the interposedslidable member, transmit movement to the' armature and thus to thecutter and at the 'same time flex the spring extension of the armature.

When the pivoted clipper handle is released the spring extension of thearmature will cause the cutter and armature to return to their formerpositions andthrough the interposed slidable member will lrestore theclipper handle to normal position. A return movement of the manuallyoperated member resets the clipper for power operatlon.

In the accompanying drawings: a. l Figure 1 is a plan of clippersconstructed 1n accordance with my invention, and with the coversremo-ved to show the interior mechanism, the clippers being vset forelectrical operation.

Fig. 2 is a similar View, but with the clippers set for manualoperation. i

Fig. 3 is a vertical section of the clippers, but with the covers inplace, and'.

Fig. 4 is a diagram illustrating the circuit connections. Y

l provide a relatively stationary cutter plate 1 having cutterteeth 2,and a fixed handle 3. A handle 4 is pivoted to the plate 1 at 5 and islimited in its outer movement by the lug 6 on the plate 1. A movablecutter plate 7 is-arranged to slide upon the plate 1 and carries cuttingteeth at its for- ,fward edge to cooperate with those of the stationarycutter plate 1. The plates 1 and 71may be recessed as at 8 and 9respectively, so as to provide for a better bearing contact betweenthemand thus avoid any rocking of the plate 7 on the plate 1. A cover 10.has a' rib 11 fitting into a longitudinal groove 12 of the plate 7 toguide it in its reciprocatory movement;` 4The cover is held held againstrotation, and a nut 18 and.

spring washer 19 on theY screw bear against the cover to holdits'against removal and to exert an adjustable pressure upon the movablecutter plate` 7.

The fixed handle 3 carries a supporting plate or casing 20 of suitablenon-magnetic material'upon which is pivoted as by screw 21, theoperating lever 22, one arm 23 ofwhich extends within the cover lOandinto a slot 211 inthe cutter plate 7 whereby oscillation of theleverwill reciprocate the cut-A ter plate 71- The screw 15 passes through anaperture 25 in the lever, and the engagement'of-the end walls of theaperture with the screw limits the movement of the lever .and thus .ofthe cutter plate. Disposed on opposite sides of the arm 26 of the leverare electromagnets 27 and 28 for producing oscillations of the lever.The arm 26 may be of suitable materialso as to itself constitute anarmature, or it may have an armature attached thereto. or casing 20 andinsulated therefrom are contact posts 29 and 30 having adjustablecontacts 31 and 32 thereon. The contact post 29 is connected to theelectromagnets 27 which are disposed on the opposite side of the levertherefrom, and the contactpost 30 is connected to the electromagnets 28disposed on the opposite side of the lever therefrom. The plate orcasing 20 carries a U- shaped contact lever 33 pivoted at 34, andthearms of which have ends upturned on opposite sides of the lever arm 26.The upturned arms carry adjustable contacts 35 and 36 for coperationwith contacts 31 and 32 to control the activity of the electromagnets,dependent upon the position of the lever 33. The lever 33 has aprojection 37 thereon which coperates with a V-shaped portion of aspring arm 38 to hold it at one side or the other of a central position.When the lever 33 is moved through its central position in eitherdirection, the co-action between the V-shaped portion of the spring arm38 and one side or the other of the projection 37 will exert a forcetending t0 con tinue the movement in that direction.v A flat springextension 39 of the lever arm 26 passes between the 'upturned ends ofthe arm 33 and since it oscillates with-.the lever it shifts the lever33 through its central position to cause engagement of contacts 35 and36 with contacts31 or 32. lA post 40 is carried by and insulated fromthe plate or casing 20, and in turn carries a spring contact arm 41adapted to be depressed into engagement with fixed contact post 42 by aninsulated lug 43 on the pivoted handle 4, projecting through the casing20 for -this purpose. The contact post 42 is electrically connected tothe lever 33, and contact post 40 is connected to one of the maincircuit wires 44, the other main circuit Wire 45 being connected as acommon return to the electromagnets 27 and 28. A weight 46 is shiftablymounted on theJ spring extension 39 of theoperating lever and -inaccordance with its distance from the pivot of the lever it will varythe period of oscillation within certain limits. The electromagnets arepreferably elliptical in cross section in' order tokeep their thicknessas small as possible.

In operation, when the pivoted handle is moved inwardly toward the fixedhandle,

the-contact 41 will be carried to' engage V42 and close the operatingcircuit. Current will pass from contact 42 to lever 33v and when thelever 26 is in the position illustrated in Fig. 1, the current will passthrough contact 36 of the lever to the adjnstable contact 32 on contactpost 30 thence Carried by the plate to the electromagnets 28 and throughthe common return wire 45 back to the main circuit. This will energizeelectromagnets 28 and the lever 26 will be attracted and moved towardthem, and in doing so will produce a movement of the cutter plate 7.During this movement of lever 26, the extension 39 will engage contact35 and shift the lever 33- past its central position. As soon as lever33 passes the central position the spring member 38 will, throughprojection 37, assist in completing the movement of this lever, andbring contact 35 into engagement with contact 31 to close the circuitthrough the electromagnets 27. Early in the movement of lever 33,however, the circuit through electromagnets 28-is broken by theseparation of contacts 36 and 32. Energization of electromagnets 27 willcause attraction and movement of lever arm 26 to-` ward them with aresultant reverse movement of the cutter plate 7. and a reverse movementof lever 33 will be produced. Y.

Thus during the engagements of the contacts 41 and 42 the oscillatorymovement of the lever 22 and of the cutter plate 7 will continue. Byadjustment of the contacts 31, 32, 35 and 36 the magnets can be kept4Closed for a longer or shorter portion of the strokeV of the armaturelever, and the throw of the armature may also be varied to some extent.j

The mechanisml by which I convert the clipper to enable manual operationwill now be described. A link 47 is slidably and pivotally mounted on apin 48 of the base' or casing 20, by means of a slot 49 therein. A

bell crank 50 is pivoted on the base and one arm 51 thereof is pivotallyconnected to one end of a link 52, the other end of this link beingpivotally connected at 53 to the link 47. The end of the casing 20 has aSlot 54 in which the shank of a screw 55 carried by a block 56 arrangedon the interior of the casing is adapted to slide.

Tightening of the screw 55 will clamp the x block 56 at'any positionalong the slot 54.

When the block is shifted from the Fig. 1 to the Fig. 2 position, theadvance end of the block engages and turns arm 50a of the bell crank 50to shift the link 47, by means of link 52, along and about pin 48 fromvthe Fig. 1 to the Fig. 2 position. After the required movement of the-bell crank, the arm A block 56 in this position. Any movement y now ofpivoted handle 4 will` cause lug 59 thereof to engage an offset end 47aon the link 47 and slide the link on p in 48, which movement ispermitted by the slot 49, and this will cause pin 5810i? the link tomove lever arm 26 about its axis with a corresponding movement of thecutter plate 7. At` the same time the spring extension 39 will be flexedupon Athe block extension 57 so that when the pivoted handle 4 isreleased, the flexed spring will restore the lever 22 to the Fig. l or 2position and provide areturn movement of the cutter plate 7. The

clipper can thus be operated manually as long as desired, but duringthis operationv the main circuit is of course disconnected. By vslidingthe blockr 56l back to the Fig. 1

position the bell crank will be restored to y Fig. l position by meansof a spring 60 secured thereto and having its other end anchored to thecasing 20. The restoring of the bell crank will restore link 47 to theFig. l position by means of the connectin link 52. rlhis leaves theclipper in condition to be electrically operated.

I claim:

l. A clipper comprising relatively movable cutterplates, power operatedmeans for producing relative movement ofthe plates,

manually operated means for also produc-` ing relative movement of theplates, andv means for selectively rendering the manuv ally operatedmeans, effective or ineffective in producing relative movement of theplates.

2. A clipper comprising a fixed cutter plate and a movable cutter plate,a lever for operating said movable cutter plate, power operated meansfor operating said lever, manually operated means for also operatingsaid lever, and means for selectively rendering said manually operatedmeans effective or ineffective -upon said lever.

3. A clipper comprisingv a fixed cutter plate and a movable cutterplate, a lever for operating said movable cutter plate electromagnetsacting on said lever to operate it, controlling means for saidelectromagnets operated by the lever, manually operated means foroperating the lever, and means for selectively rendering said manuallyop* erated means effective or .ineffective upon said lever.

4. A clipper comprising a fixed cutter plate and a movable cutter plate,alever for operating said movable cutter plate, electrical means forcausing oscillations of said lever and means carried by said lever forcontrolling its rate of oscillation by the said electrical means.

5. A clipper comprising a fixed cutter plate and a movable cutter plate,a lever for operating said movable cutter plate, electrical means forcausing oscillations of said lever, and means adjustably carried by saidlever for variably controlling its rate of oscillation caused by theelectrical means.

6. A clipper comprising a fixed cutter plate and a movable cutter plate,a lever for operating said movable cutter plate,' electrical means forcausing oscillations of said lever, a shiftable weight on said extensionfor variably lcontrolling the rate of oscillation caused by theelectrical means.

37. A clipper comprising a fixed cutter plate, a'movable cutter plate, astationary handle, a pivoted handle, alever for operating said -movablecutter plate, power operated means carried by the stationary handle forcausing oscillations of said lever, and shiftable means for operativelyconnecting and disconnecting the pivoted handle and lever to enableoperation of said lever by said pivoted handle.

8. A clipper comprising 'a fixed cutter plate, a movable cutter plate, astationary handle a pivoted handle a lever for opercrated means carriedby the stationary han-v dle for causing oscillations of said` lever, aslidable member, a manually operated mem* ber intermediate mechanismoperated by said manually operated member for interposing said slidablemember between thel pivoted handle and the pivoted lever to enable oeration of the lever by the handle.-

l0. clipper comprising a fixed cutter plate, a movable cutter plate, astationary handle` a pivoted handle, a. lever for operating the movablecutter plate, a spring extension of said lever, a support carried by thestationary handle, power operated meansJ v on said support for operatingsaid lever, a pin carried by said support, a link mounted or pivotal andsliding movement on said pin, and manually loperated means carried bysaid support for shifting said link about said pin to interpose itbetween the pivoted handle and the spring extension and enable operationof the lever from the pivoted handle.

ll. A clipper comprising a fixed cutter plate, a movable cutter plate, astationary handle, a pivoted handle, a lever for operating the movablecutter plate, a spring extensionA of said lever, a support carried bythe stationary handle, power, operated i means on said support foroperating said lever, a pin carried by said support, a link mounted forpivotaland sliding movement on said pin, and manually operated meanscarried by said .support for shifting said erating said movable cutterplate, electromagnets placed on opposite sides of said lever tooscillate it and thereby the movable cutter plate, a pivoted contactmember operated fromone position to the other by said lever, a springmember coperating with said pivoted contact member to yieldingly holdthe .contact member to either side of a central position whereby whenthe contact member is moved through the central position, the springmember will exert alrforce to complete the movement in the samedirection, and stationary contacts coperating with said pivoted contactmember to control the activity of said electromagnets', dependent uponthe position of the lever.

13.' A clipper comprising a fixed cutter plate, a movablecutter plate,a-lever for operating said Amovable cutter plate, electromagnets placedon opposite sides of .said lever 4to oscillate it and thereby themovable cutter plate, Va pivoted contact member operated from oneposition to the other by said lever, a spring member cooperating vwithsaid pivoted contact member to yieldingly hold the contact member toeither side of a central position whereby when the contact member ismoved through the central position, the spring member will exert a forceto complete the movement in the-same direction andA adjustablestationary contact members for controlling the activity of saidelectromagnets dependent upon the position of the lever.

` 14. A clipper' comprising a lixed cutter plate, a movable cutterplate, av lever for operating said movable cutter plate, electromagnetsplaced on opposite sides of said lever to oscillate it and thereby themovable cutter plate, a pivoted contact member operated from oneposition to the other. by

said lever, adjustable, contacts carried by,

said pivoted contact member, a spring member cooperating with saidpivoted contact member to yieldingly hold the contact member to eitherside -of a central position whereby when the contact member is movedthrough the central position the spring member will exert a force tocomplete the movement in the same direction and stationary contacts coperating with the adjustable contacts of said pivoted contact member tocontrol the activity of said electromagnets, depending upon theposition, of the lever. l

15. A clipper comprising a ixed cutter plate, a movable cutter plate, alever for operating said movable cutter plate, electromagnets placed onopposite sides of said lever to oscillate i't and thereby the movablevcutter plate, a pivoted contact member op` erated from one position tothe other by said lever, adjustable contacts carried by said pivotedcontact member, a spring member coperating with said pivotedcontactmember to yieldingly holdthe contact member to either side of acentral position whereby when the contact li'nember is moved through thecentral position, the spring member will exert a force to complete themovement in the same direction, and adjustable stationary contactscoperating with the ad- JoHN N. JOHNSON.

